| /* _ _ |
| ** _ __ ___ ___ __| | ___ ___| | mod_ssl |
| ** | '_ ` _ \ / _ \ / _` | / __/ __| | Apache Interface to OpenSSL |
| ** | | | | | | (_) | (_| | \__ \__ \ | www.modssl.org |
| ** |_| |_| |_|\___/ \__,_|___|___/___/_| ftp.modssl.org |
| ** |_____| |
| ** ssl_util_sdbm.c |
| ** Built-in Simple DBM (Header) |
| */ |
| |
| /* ==================================================================== |
| * Copyright (c) 1998-2001 Ralf S. Engelschall. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following |
| * disclaimer in the documentation and/or other materials |
| * provided with the distribution. |
| * |
| * 3. All advertising materials mentioning features or use of this |
| * software must display the following acknowledgment: |
| * "This product includes software developed by |
| * Ralf S. Engelschall <rse@engelschall.com> for use in the |
| * mod_ssl project (http://www.modssl.org/)." |
| * |
| * 4. The names "mod_ssl" must not be used to endorse or promote |
| * products derived from this software without prior written |
| * permission. For written permission, please contact |
| * rse@engelschall.com. |
| * |
| * 5. Products derived from this software may not be called "mod_ssl" |
| * nor may "mod_ssl" appear in their names without prior |
| * written permission of Ralf S. Engelschall. |
| * |
| * 6. Redistributions of any form whatsoever must retain the following |
| * acknowledgment: |
| * "This product includes software developed by |
| * Ralf S. Engelschall <rse@engelschall.com> for use in the |
| * mod_ssl project (http://www.modssl.org/)." |
| * |
| * THIS SOFTWARE IS PROVIDED BY RALF S. ENGELSCHALL ``AS IS'' AND ANY |
| * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL RALF S. ENGELSCHALL OR |
| * HIS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| * OF THE POSSIBILITY OF SUCH DAMAGE. |
| * ==================================================================== |
| */ |
| |
| /* |
| * sdbm - ndbm work-alike hashed database library |
| * based on Per-Ake Larson's Dynamic Hashing algorithms. BIT 18 (1978). |
| * author: oz@nexus.yorku.ca |
| * status: public domain. |
| */ |
| |
| #ifndef SSL_UTIL_SDBM_H |
| #define SSL_UTIL_SDBM_H |
| |
| #define DUFF /* go ahead and use the loop-unrolled version */ |
| |
| #include <stdio.h> |
| |
| #ifdef MOD_SSL |
| #define DBLKSIZ 16384 /* SSL cert chains require more */ |
| #define PBLKSIZ 8192 /* SSL cert chains require more */ |
| #define PAIRMAX 8008 /* arbitrary on PBLKSIZ-N */ |
| #else |
| #define DBLKSIZ 4096 |
| #define PBLKSIZ 1024 |
| #define PAIRMAX 1008 /* arbitrary on PBLKSIZ-N */ |
| #endif |
| #define SPLTMAX 10 /* maximum allowed splits */ |
| /* for a single insertion */ |
| #define DIRFEXT ".dir" |
| #define PAGFEXT ".pag" |
| |
| typedef struct { |
| int dirf; /* directory file descriptor */ |
| int pagf; /* page file descriptor */ |
| int flags; /* status/error flags, see below */ |
| long maxbno; /* size of dirfile in bits */ |
| long curbit; /* current bit number */ |
| long hmask; /* current hash mask */ |
| long blkptr; /* current block for nextkey */ |
| int keyptr; /* current key for nextkey */ |
| long blkno; /* current page to read/write */ |
| long pagbno; /* current page in pagbuf */ |
| char pagbuf[PBLKSIZ]; /* page file block buffer */ |
| long dirbno; /* current block in dirbuf */ |
| char dirbuf[DBLKSIZ]; /* directory file block buffer */ |
| } DBM; |
| |
| #define DBM_RDONLY 0x1 /* data base open read-only */ |
| #define DBM_IOERR 0x2 /* data base I/O error */ |
| |
| /* |
| * utility macros |
| */ |
| #define sdbm_rdonly(db) ((db)->flags & DBM_RDONLY) |
| #define sdbm_error(db) ((db)->flags & DBM_IOERR) |
| |
| #define sdbm_clearerr(db) ((db)->flags &= ~DBM_IOERR) /* ouch */ |
| |
| #define sdbm_dirfno(db) ((db)->dirf) |
| #define sdbm_pagfno(db) ((db)->pagf) |
| |
| typedef struct { |
| char *dptr; |
| int dsize; |
| } datum; |
| |
| extern datum nullitem; |
| |
| #ifdef __STDC__ |
| #define proto(p) p |
| #else |
| #define proto(p) () |
| #endif |
| |
| /* |
| * flags to sdbm_store |
| */ |
| #define DBM_INSERT 0 |
| #define DBM_REPLACE 1 |
| |
| /* |
| * ndbm interface |
| */ |
| extern DBM *sdbm_open proto((char *, int, int)); |
| extern void sdbm_close proto((DBM *)); |
| extern datum sdbm_fetch proto((DBM *, datum)); |
| extern int sdbm_delete proto((DBM *, datum)); |
| extern int sdbm_store proto((DBM *, datum, datum, int)); |
| extern datum sdbm_firstkey proto((DBM *)); |
| extern datum sdbm_nextkey proto((DBM *)); |
| |
| /* |
| * other |
| */ |
| extern DBM *sdbm_prep proto((char *, char *, int, int)); |
| extern long sdbm_hash proto((char *, int)); |
| |
| /* pair.h */ |
| extern int fitpair proto((char *, int)); |
| extern void putpair proto((char *, datum, datum)); |
| extern datum getpair proto((char *, datum)); |
| extern int delpair proto((char *, datum)); |
| extern int chkpage proto((char *)); |
| extern datum getnkey proto((char *, int)); |
| extern void splpage proto((char *, char *, long)); |
| extern int duppair proto((char *, datum)); |
| |
| /* tune.h */ |
| /* |
| * sdbm - ndbm work-alike hashed database library |
| * tuning and portability constructs [not nearly enough] |
| * author: oz@nexus.yorku.ca |
| */ |
| |
| #define BYTESIZ 8 |
| |
| /* |
| * important tuning parms (hah) |
| */ |
| |
| #define SEEDUPS /* always detect duplicates */ |
| #define BADMESS /* generate a message for worst case: |
| cannot make room after SPLTMAX splits */ |
| /* |
| * misc |
| */ |
| #ifdef DEBUG |
| #define debug(x) printf x |
| #else |
| #define debug(x) |
| #endif |
| |
| #endif /* SSL_UTIL_SDBM_H */ |
